Tightener



Patented July 18, 1922.

1. T. SIMPSON.

TIGHTENER.

APPLICATION FILED APR. I. 1920.

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Application 'led April 1,

To all whom it may concer/n,

Be it known that I, JOHN T. SiMrsoN, a citizen ofthe United States, and a resident of Newark, inthe county of Essex and State of New Jersey, have invented a certain new and useful Tightener, of which the' `following is a specification. v

This invention relates to tighteners in general and more especially to tighteners for securing together Ythe forms of concrete molds and the like. f

Most of the tighteners operating similar to the embodiment ot the present invention, for securing together theforms of concrete molds, are provided with tightening de vices intended initially to draw the forms into position, and then to be relieved by auxiliary locking devices whereupon the tightening devicesV would be removed for drawing other forms rinto position. The expense oi the tightening devices made it desirable to so use them. In view of. the extra work involved in the use of the devices as aforesaid, Oneofthe objects yoit the present invention is -to so simplify the construction with the consequent reduction in the cost of manufacture, that the tightening devices may be used to serve not-only as the tightening element, but also as the anchor for locking the forms in place during their use.

Specifically the invention further contemplates a tightening device which may be used with various dimensions of rods; which is provided with means functioning to etliciently protect the threads oi the device against admission of concrete or other foreign material, to guide the device, and to serve as a bearing for the nut acting portion of the device; and which is provided with an extended operatingv surface to facilitate operating the device in places inconvenient for access.

Specically one of the embodiments of the invention contemplates an improved dog for anchoring the tightening device to the rod with which it cooperates, which dog is provided with a head that is adapted both to receive the blow of a hammer when. driving the dog` into anchoring position, and is further adapted to receive the claws of the hammer for subsequently withdrawing the dog out of rod anchoring position.

These and other features, capabilities and advantages of the invention will appear from the subjoined detail description of Specification of Letters Patent.

ratenrea July is, ieee. i920. serial No. 370,448.

specific embodiments of the linvention illustrated in the accompanying drawings in which` n l 4 Figure 1 is a -itragmental side eleva-tion showing a concrete mold equipped with one form Vof the present invention.

l `igure 2 .is a fragmental side elevation partl'y'in section of the form device illustrated in Figure l1. 'Figure 8 is a front end e'levationot the device shown in Figure 2. i'

Figure 11 Vis an end elevation of the washer in position on the end of the tighteningr device.

Figure 5 is a fragmental side elevation showing a different form of dog than that illustrated in Figure 2; and Figure 6 is an end elevation of the dog illustrated 'in ,Fifgf ure 5.

In Figure 1 the form boards 7 are shown secured between cross bars 8 which are lconnected by tighteners constituting the present invention.

The tightenerseach comprise a rod 9 preferably having a head A10 at one end toabut against a cross ybar y8, the remainder of "the rod being free to extend through'cooperatinglcross'ba'rs 8, 8 rand lsutliciently projecting from the remote cross bar to receive the tightening device generally designated as 11.

The tightening device comprises essentiall)v an actuating' member 19, a longitudinally movable member 18, and an anchoring` member 111-, for anchoring the movable niembeil l3`to the rod 9. The actuating member 12 is internally threaded to receive the eX- of tightening ternally threaded portion of the movable y member 13, and is provided, with an eX- tended angular wrench seat l5 extending substantially its entire length. The movyable member 18 comprises essentially an rod 9 when driven toward the actuating member 12 in the direction of the dotted line position indicated in Figure 2.

The lugs 16 are formed at the free end of the movable member 13 and form the terminal continuations of the reinforcing annular bead 19 formed on such end of the movable member. The movable member' 13 as shown in Figure 2, to accommodate the dog is recessed beyond lugs 16, and the eX- ternal threads on the movalble member 13 terminate a substantial distance from the dog recess thus to insure the proper operation of the device.

In Figure Q, the dog there shown is provided with a T-head Q0 which may serve to receive the blow of a hammer when driving the dog into biting position and in turn the ears 21 of the T-head may serve to cooperate with the claws of a hammer when removing the dog out of engagement with the rod.

The end o'lthe actuating member V12 is provided with an enlargementQQ to receive the Washer Q3 which preferably comprises a disc portion 2li and finger-S25 for engaging the enlargement 22 as shown. The washer 23, by snugly engaging the rod 9, willprevent the admission of' concrete or other foreign material to the threads of the actuating member 12 and movable member 1 3 and will also serve to engage a bar 8 and thus form a bearing for the actuating mem'- ber 12, thereby guarding against the grinding of such actuating member 12 into the bar 8 so obnoxious when the bar 8 is composed ot wood or the like. y

The dog 26 shown in Figures 5 and 6 has an upward extension 27 instead of the T- head 20 of the dog 14. In this embodiment, the extension 27 may serve both to receive the blow for biting the dog into the rod, and also to receive the blow for withdrawing the dog out of engagement with the rod.

It is obvious that various changes` and end oi; said actuating member, a washer,-

and fingers on said washer for `engaging said enlargement, said engagement permitting' relative rotation of the washer and actuating member.

2. A, device of the class described having an internally threaded tubular actuating member, an externally threaded tubular movable member, a dog, lugs on said movable member, there being a recess in said .movable member registering with said lugs to receive said dog, a pin for pivotally connecting the dog to said lugs, and a T-hcad on said dog functioning both to receive the blow of a hammer when driving the dog into position and to cooperate with the claws of a hammer when removing the dog out of engaging position.

. This speciiicatlon signed and` witnessed this 24th day of March, 1920.

JOHN T. sIMPsoN.

Vfitnesses l ETHEL M JONES,

H. BoofrH. 

